Lock-nut.



` bolt, havin )arrangement of devices, hereinafter de- UNITED STATES PATENrOFFic.

'GEORGE 1..,YOUNG, or rRANKroar INDIANA;

LOCK-N UT.

Specification of Letters Patent.

Patented June 24:, 1913.

Application led December 28, 1912. Serial No. 789,094.

scribed and claimed.

In the accompanying drawing:

Figure l is a side elevation of a bolt and nut provided with locking devices constructed in accord- Y ance with my invention. Fig. 2 is a plan of the same. Fig. 3 is a detail plan of the base washer. Fig. 4 is a detail sectional view on the plane indicated by the line 4-4 of Fig. 2. 4

The bolt 1, which may be otherwise of any suitable construction is, in accordance with my invention, provided with a suitable number of longitudinal grooves 2 which extend across the threads, two of the said grooves being here shown. In connection with the bolt, I provide a base washer 3 to fit on the an opening 4 through which the stem o the bolt extends and provided with studs 5 for engaging the grooves 2 of the bolt to lock the base washer on the bolt against rotation. The nut 6 is provided near' one corner with a bore 7 which extends therethrough and is provided near the diags onally Opposite corner with Aa groove 8 in one of its faces, the said groove extending from the inner to the outer side of the nut. A locking spring 9 is employed in connection with the nut and has an angular central portion '10 whichAv bears on the face of the nut, an attaching arm 11 secured in the bore 7 and a locking arm 12 at the end opposite the attaching arm, the said locking arm being arranged in the groove 8 of the nut and adapted at its free end to engage anyone of a series of tangential ratchet teeth 13 with which the base washer is provided. The nut has a recess 14 in one side under the central portion 9 of the locking spring for the insertion of an instrument to release the locking armofthe. spring from the ratchet teeth to permit thel adjustment of the nut 'on the bolt or'the removal of the nut, as may be desired.

While I have herein vshown and described a preferred form of my invention, I would have it understood that changesv may be made in the form, proportion and construction of the several parts, .without departing `from the spirit'of my invention and within the scope ofthe appended claimt In combination with a bolt having Aa longitudinal groove 'extending' across its threads, a washer on the bolt having a stud engaging said groove, said washer also having ratchet teeth on its outer face, a nut on the bolt and having a bore near one corner and a groove in one s'ide near the diagonally opposite corner, and a locking spring arranged on the face of the nut having anattaching arm secured in the bore and also having a locking arm arranged in groove of thenut and adapted at its free end toengage the ratchet teeth of the washer.

In testimony whereof I ax my signature I in presence of two witnesses.

GEORGE I... YOUNG. 'Witnesse-s: Y

LEONARD J'. CURTIS, Mom` B. FISHER. 

